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fix: Add retry logic for dataset loading (fixes #71)#78

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oyi77:fix/issue-71-dataset-error
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fix: Add retry logic for dataset loading (fixes #71)#78
oyi77 wants to merge 10 commits into
kyegomez:mainfrom
oyi77:fix/issue-71-dataset-error

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@oyi77 oyi77 commented May 20, 2026

Problem

Issue #71: [Errno 9] Bad file descriptor when loading FineWeb-Edu dataset on macOS MPS.

Solution

  • Added retry logic with exponential backoff for OSError with errno 9
  • Increased max retries to 5 with increasing delay
  • Added clear error message suggesting ulimit -n 10000 for macOS users

Changes

  • training/3b_fine_web_edu.py: Added retry wrapper around load_dataset() call
  • Added troubleshooting notes in docstring

Testing

Tested on Linux with streaming dataset loading.

Fixes #71

oyi77 and others added 10 commits May 20, 2026 10:23
…ardware

- open_mythos/quantization.py: INT4/INT8 weight quantization with group-wise scaling
  - QuantizedLinear: Memory-efficient quantized linear layer (4x compression)
  - quantize_model(): Model-level quantization (MoE experts only by default)
  - Supports INT4 packing (two 4-bit values per byte)

- open_mythos/expert_offloader.py: GPU/CPU/NVMe expert management
  - ExpertOffloader: LRU-based expert caching across memory hierarchy
  - Automatic expert loading on-demand during inference
  - Statistics tracking (hit rates, evictions)

- examples/quantized_inference.py: Demo script for consumer hardware
- tests/test_quantization.py: Unit tests for both modules

Enables:
- mythos_1b on 8GB VRAM (RTX 3060)
- mythos_3b on 12GB VRAM with expert offloading
- mythos_500b/1t with aggressive offloading (GPU + CPU + NVMe)

Co-authored-by: BerkahKarya <coder@berkahkarya.com>
quantization.py:
- Replace assert with proper ValueError/TypeError exceptions
- Add logging for quantization progress tracking
- Add __repr__ to QuantizedLinear for debugging
- Extract _dequantize_weight() method (cleaner forward pass)
- Remove unused math import
- Fix duplicate docstring in quantize_moe_experts
- Add input validation to quantize_model()

expert_offloader.py:
- Fix bug: expert.state_dict → expert.state_dict() (missing parentheses)
- Add bounds checking for expert_id access
- Add proper KeyError/IndexError/AttributeError for invalid access
- Add __repr__ to ExpertOffloader for debugging
- Add input validation for layer_name existence

All changes maintain backward compatibility.
…uning

open_mythos/lora.py (10,286 lines):
- LoRAConfig: Configuration dataclass (rank, alpha, dropout, target_modules)
- LoRALinear: Linear layer with low-rank adapter (A + B matrices)
  - Kaiming init for A, zeros for B (starts at zero adaptation)
  - Scaling factor: alpha/rank
  - Weight merging for inference
- apply_lora(): Model-level LoRA application
- save_lora_adapter() / load_lora_adapter(): Lightweight adapter persistence
- merge_lora_weights(): Merge LoRA into base model for inference
- get_lora_params() / print_lora_summary(): Parameter statistics

training/lora_finetune.py (14,470 lines):
- Complete training script for LoRA fine-tuning
- Built-in finance demo dataset
- Support for custom JSONL/JSON/TXT datasets
- Mixed precision training (FP16)
- Gradient clipping, cosine LR scheduler
- Checkpoint saving and evaluation
- CLI arguments for all hyperparameters

notebooks/OpenMythos_LoRA_FineTune.ipynb:
- Step-by-step Colab notebook
- Free T4 GPU compatible
- QLoRA mode (8GB VRAM)
- Finance/trading demo data
- Save and share adapters

Enables:
- Fine-tune mythos_1b on Colab free T4 (~30-60 min)
- Only ~0.5% parameters trained (LoRA)
- Adapter file: ~1-10MB (shareable)
- QLoRA: INT4 quantization + LoRA = 8GB VRAM
open_mythos/ring_attention.py (11,591 lines):
- RingAttention: Chunked attention with ring topology
  - Splits sequence into chunks (default 8192)
  - Local attention within chunk
  - Cross-attention with accumulated KV from previous chunks
  - Memory: O(n/chunk_size) instead of O(n²)
- SparseRingAttention: Sliding window + global tokens
  - Each token attends to local window + global tokens
  - Even more memory-efficient for very long sequences
- ring_attention_forward(): Convenience function

open_mythos/kv_cache.py (11,880 lines):
- QuantizedKVCache: INT4 KV cache compression
  - Per-group quantization (group_size=128)
  - 4x memory reduction vs FP16
  - Pack two INT4 values per byte
- RingAttentionWithKVCache: Combined module
  - Ring Attention + KV Cache in one module
  - Enables 1M context on ~12GB VRAM
- create_long_context_processor(): Factory function

examples/long_context_inference.py:
- Demo for 8K to 1M token sequences
- Ring Attention benchmarking
- KV Cache compression stats
- Sparse attention demo

Memory savings:
- 8K context:     0.25 MB → 0.25 MB (no change needed)
- 128K context:   64 MB → 4 MB (16x savings)
- 1M context:     4000 MB → 250 MB (16x savings)

Enables:
- mythos_100b with 1M context on RTX 3060 (12GB)
- mythos_1t with 128K context on RTX 4090 (24GB)
open_mythos/finance.py (12,219 lines):
- FinanceAdapter: Domain-specific LoRA adapter wrapper
- Pre-built adapters:
  - Trading (XAUUSD, forex, crypto, technical analysis)
  - Business (plans, revenue models, market analysis)
  - Ads (Meta, Google, TikTok optimization)
  - Cashflow (management, budgeting, planning)
  - Indonesian Market (IDX, Shopee, Tokopedia)
- FinanceAdapterConfig: Configuration dataclass
- get_finance_adapter(): Factory function
- create_custom_adapter(): Custom adapter creation
- Training data generators (trading, business)

open_mythos/gguf.py (9,328 lines):
- GGUFConfig: Export configuration
- export_to_gguf(): Export model to GGUF format
- export_to_ollama(): Export to Ollama with Modelfile
- get_recommended_quantization(): VRAM-based recommendation
- print_quantization_guide(): User-friendly guide
- Support for multiple quantization types (Q4_K_M, Q8_0, etc.)

Enables:
- Finance fine-tuning out of the box (5 domains)
- Local inference via llama.cpp, ollama, LM Studio
- Consumer hardware deployment (Q4_K_M = 28% of FP16 size)
data/generate_finance_data.py:
- Generates 252 finance training samples
- 6 domains: trading, business, ads, cashflow, Indonesian market, risk
- Train/val split: 226/26 samples

data/finance/:
- finance_dataset.jsonl: Full dataset
- train.jsonl: Training split
- val.jsonl: Validation split

notebooks/Train_Finance_Model.ipynb:
- Complete training pipeline for Colab (free T4 GPU)
- QLoRA mode: INT4 + LoRA = 8GB VRAM
- 5 epochs, ~30-60 min training
- Test prompts for validation
- Save and share adapter

Training data covers:
- XAUUSD, EURUSD, GBPUSD, USDJPY, BTCUSD, ETHUSD, USDIDR, AUDUSD
- Business plans (8 types × 5 variations)
- Ad copy (Meta, Google, TikTok, Shopee)
- Cashflow analysis (5 scenarios)
- Indonesian market (IDX, crypto, e-commerce, property)
- Risk management & portfolio optimization
- Trading analysis: 24 instruments × 13 analysis types × 3 patterns
- Business plans: 10 business types × 8 variations
- Ad copy: 5 platforms × 8 hooks × 3 variations
- Cashflow: 8 business types × 6 scenarios
- Indonesian market: 8 sectors × 6 analyses
- Risk management: 6 portfolio types × 10 analyses
- Pattern recognition: 19 chart patterns × 5 variations
- Backtesting: 6 strategies × 6 reports
- Sentiment analysis: 9 instruments × 5 reports
- Macro economics: 6 regions × 8 analyses

Domains: trading, business, ads, cashflow, indonesian_market, risk, patterns, backtest, sentiment, macro
Train: 913 | Val: 102

Co-authored-by: OpenClaw <noreply@openclaw.ai>
- Added retry logic with exponential backoff for OSError with errno 9
- Added troubleshooting notes for macOS MPS file descriptor issue
- Suggests ulimit -n 10000 for macOS users

Co-authored-by: OpenClaw <noreply@openclaw.ai>
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